Question

If a2+b2=49 and ab=20 find the value of a-b

Answer 1

Answer:

Step-by-step explanation:

I think your answer be 9...

Answer 2

The value of a-b is 3

Step-by-step explanation:

given that

$a^2+b^2 = 49 \\\\ab = 20$

we know that

$(a-b)^2 = a^2+b^2 -2ab$..(1)

placing all the values in equation 1 we get

$(a-b)^2 = a^2+b^2 -2ab \\\\(a-b)^2 = 49 - 2(20)\\\\(a-b)^2 =49-40\\\\(a-b)^2 =9\\\\(a-b) =\sqrt{9}\\\\a-b =3$

hence , The value of a-b is 3

#Learn more:

If a+b =14 and Ab =20 find the value of a2 + b2

https://brainly.in/question/7417186